package com.xizi.service;

import com.alibaba.fastjson.JSON;
import com.xizi.pojo.Content;
import com.xizi.utils.Jsoup;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.naming.directory.SearchResult;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;


//业务编写
@Service
public class ContentService {

    @Autowired
    private RestHighLevelClient restHighLevelClient;


//    public static void main(String[] args) throws Exception {
//        new ContentService().parseContent("java");
//    }
    //1.解析数据 放入es索引库中
    public Boolean parseContent(String keywords) throws Exception {
        List<Content> contents = new Jsoup().parseJD(keywords);

        //把查询的数据插入到es中
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.timeout("2m");

        for (int i = 0; i < contents.size(); i++) {
            bulkRequest.add(new IndexRequest("goods_test")
            .source(JSON.toJSONString(contents.get(i)), XContentType.JSON));
        }

        BulkResponse bulk = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
        return !bulk.hasFailures();
    }

    //2.获取数据实现搜索功能
    public List<Map<String,Object>> searchPage(String keyword,int pageNo,int pageSize) throws IOException {
           if (pageNo<1){
               pageNo=1;
           }
           //条件搜索
        SearchRequest searchRequest = new SearchRequest("goods_test");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        //分页
        sourceBuilder.from(pageNo);
        sourceBuilder.size(pageSize);

        //精准匹配
        TermQueryBuilder title = QueryBuilders.termQuery("title", keyword);
        sourceBuilder.query(title);
        sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));

        //高亮
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.field("title");

        highlightBuilder.requireFieldMatch(false); //多个高亮显示
        highlightBuilder.preTags("<span style='color:red'>");
        highlightBuilder.postTags("</span>");
        sourceBuilder.highlighter(highlightBuilder);
        //执行搜索
        searchRequest.source(sourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);

        //解析结果
        ArrayList<Map<String,Object>> list = new ArrayList<>();
        for (SearchHit documentFields : searchResponse.getHits().getHits()) {

            //解析高亮的字段
            Map<String, HighlightField> highlightFields = documentFields.getHighlightFields();
            HighlightField title1 = highlightFields.get("title");
            Map<String, Object> sourceAsMap = documentFields.getSourceAsMap();//原来的结果
            //解析高亮的字段 将原来的字段换为我们高亮的字段即可
            if (title1!=null){
                Text[] fragments = title1.fragments();
                String n_title="";
                for (Text text : fragments) {
                    n_title+=text;
                }
                sourceAsMap.put("title",n_title);  //高亮字段替换掉我们原来的内容即可
            }
            list.add(sourceAsMap);
        }
        return list;


    }


}
